How the bids stand

Paris remains favourite to host despite security fears and the mayor only belatedly getting behind the bid.

Second favourites Los Angeles could be hampered by President Donald Trump’s efforts to restrict travel into the US.

Budapest’s bid is in the balance as opponents claim the money should be spent on public services.

Rome withdrew in October 2016, with city mayor Virginia Raggi saying rubbish collection was more important.

Hamburg withdrew in November 2015 after voters rejected the plan in a referendum.

Boston bid chiefs pulled out in July 2015, citing a lack of support among the public.